Wilder Girls by Rough Rori Pat

It's been 18 months since the raxter school for girls was put under quarantine. Now cut off from the rest of the world and left to fend for themselves on their island home. But when bryat by, it that's a dumb name, byat, goes missing, hetty will do anything to find her. When she does, hetty learns that there's more of the story to their life at braxter than she could ever have thought true. Books and lala wall the girls, five stars.